Ice-cream freezer.



E. THOMPSON.

ICE CREAM FREEZER.

APPLICATION FILED DEG.5, 1912.

LOMJNQ. Patented Dec. 16,1913.

4SHEBTS-SHEET1.

fi l g rl WITNESSES l/VVE/VTGR fizz. fl Emery Thompson,

ATTORNEYS E. THOMPSON.

ICE CREAM FREEZER. APPLICATION FILED 13210.6, 1912.

Patented Dec. 16, 1913.

2 T E E H S L T B B H S 4 m, R S 5 7 M W R WM m A -V r e .m "E

llllllllllllll WITNESSES E. THOMPSON.

ICE CREAM FREEZER.

APPLICATION FILED 920.5, 1912v 1,081,790. Patented Dec. 16, 1913.

4 SHEETSSHEET 3.

WITNESSES INVENTOR #fl E ery Thompson,

Q By man/ms E. THOMPSON.

10E CREAM FREEZER.

APPLICATION FILED DEC. 5, 1912. 1,081,790.

Patented Dec. 16, 1913.

4 SHEETS-SHEET 4.

WITNESSES I l/WE/VTOR Emery Thompson, a W22; W

ATTORNEYS -with the drivinggear arranged at t UNITED STA'IFltt PATENT, OFFICE. UEMEBYQ momrsoiv, oF N Ew' ROCHELLE, NEW YORK, AssiGNon To many anonrs'on MA'cHINIi'ANn-sUPrLY Co., or New roan; N. Y.

xcn cnnnm memes:

moi-390i specification of=Letters Patent.

Applieationflled'December 5, 1912. Serial No. 785,087. a

To. all-whom it may concern Be it knownthat I, Eimmr THoMPsoN, a citizen ofthe United States, and a resident of New Rochelle, in the county of Westchester and State of New York, have invented a new and Improved Ice-Cream Freezer, of whieh'thefollowing is a full, clear, and exact description.

The invention relates to ice cream freezers in which a circulating brine or similar freez ingfiuid is used as the freezing. medium.

The object ofithe invention is to provide a newand improved ice cream freezer arranged'to provide a large refrigeratingsurface, to avoid dormant non-freezing surfaces thusinsurin-ga'more rapid freezingand preventing deterioration in. the texture and quality of-the ice cream.

In order toaccomplish the desired result use is made of a vessel for containing the material-to be frozen, a chamber surround= ing the said vessel, and a hollow head common' to both the said vessel and the said chamber; the interior of the hollow head being. in communicationwith the interior of the said chamber-to allowthe freezing medium tocirculate through the hollow head and the said chamber.

A practical embodiment ofthe invention isrepresented in the accompanying draw-' ings-forminga part of'this' specification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure 1 is a sectional side elevation of an ice cream freezer of the vertical type and e bot tom, parts of the icegcream freezer being shown in elevation; Fig. 2 is a sectional plan view of the same on the line 2-2 of Fig. 1, the drivinggearbeing. omitted; Fig. 3 is a cross section of the same on the line 33 of Fig. 2; Fig. 4:,is a fragmentary vertical sectional viewof a ,portion of the upper end of the casing; Fig. 5 is a like view of a modified. form of the spiral passage between the outer and inner cylinders; Fig. 6 is acentral vertical sectional view of an ice cream freezer ofthe horizontal type; and Fig. 7 is a vertical sectional view of an ice cream freezer of the vertical type and with the driving gear arranged at the top, parts of the ice cream freezer being shown in elevation.

,, The ice cream freezer shown in Fig. 1 is mounted on. a suitably constructed stand A' which supports a hollow bottom head B, on

the top of which are set the inner and=outer cylinders C and -D arranged in spaced relation so-as to form an inner vessel for. corn taining the cream or other material to be frozen and to provide a chamberbetween the cylinders for the passage of brine or other suitable freezing medium.

Within the vessel is, arranged an agitator E and-a scraper-E of the usual type to a tate the ice cream-or other material-to e frozen. The upperends of-the cylinders C and D are engaged by a ring-shaped hollow upper closure F provided-with acover' G on which is set the' creampan H from which the cream isdischarged into the vessel by the use of a suitable valve, such as is common in ice cream freezers now in use;

' The hollow bottom headBis connected by a pipe Iwith asource of freezing medium, and on the pipe is arranged the usual thermometer I to indicate the temperature of the' freezigg medium. In the top of the bottomhe Bare arranged ports a which open into the chamber or space between the cylinders U and D so that the freezingjmedium can pass from 'the hollow headB by Patentedbec. re; 1913."

way of the ports a into the said chamber.

Within this chamber is arranged a spiral J formed of angle iron and having its convolutions spaced apart, the horizontal member of the spiral having its inner end soldered'or otherwise fastened to the exterior surface of the cylinder C while the outer vertical mem her is spaced from the inner surface of the outer cylinder D, as plainly indicated in Fig. 4. A spiral band K extends between the convolutions of the spiral J at the vertical members, and this band is likewise spaced from the inner surface of theouter cylinder D. By the arrangement described a spiral 'pas; sage is provided between the cylinders() and D and through this spiral passage circulates the freezingmedium, it being understood that by the construction described the freezing medium is in direct contact with the exterior surface of the inner cylinder C, and hence thefreezing medium is very effective. The upper end of the spiral passage opens into the hollow closure F which is provided with an outlet pipe L for carrying off the freezing medium. Now it will be noticed that by the arrangement described the freez ing medium circulates through the bottom head B, then passes through the spiral passage formed between the inner and outer cylinders O and D, to finally-pass into the closure F and from the latter by way of the I pipe L to a suitable place of discharge.

From theforegoing it will be seen that the cream or other material contained in the freezing vessel is subjected to the cold of the freezing medium contained in the hollow bottom head B as well as in the spiral passage, and hence a large refrigerating surface is provided and dormant non-freezing spaces are avoided.

' The outer cylinder D is preferablymade of steel and provided with a copper lining at the inside so as to provide an exceedingly strong structure.

llt will be noticed that by spacing the vertical member of the spiral J and the band K from the inner surface of the outer cylinder D, the freezing medium can pass to the outside of the band and the spiral and consequently the pressure is equalized on both the inner and outer surfaces of the band to prevent bucklin or injury thereof, the band being prefera ly soldered at its upper and lower edges to the corresponding convolutions of the spiral J. 1

' The bottom head B is provided with a dischargeopening B (see Figs. 2- and3) which connects at its upper end withthe interior of the vessel, and, at its lower outer chargin end, is normally closed b a manually-controlled gate or a valve to allow of disthe ice cream from the freezing vessel. he head Band closure F are preferably connected with each other bystays 0 arranged exterior-1y of the outer cylinder D, and an i'nclosing shell P is preferably attached to the peripheral faces of the head B and closure F so as to give-a fine finish to the ice cream freezerr s As shown in Fig. 1, the driving gear Q for the agitator F. and the scraper E is arran edat the bottom" 'wl1ile in the constructlon shownin Fig. 7 the driving gear Q for the-agitator lE-and the scraperE is arranged at the top. but otherwise the construction is practically the same as above described inreference to Fig. 1, so that further description of this modified form is not deemed necessary.

If desired, the spiralband'K may 'be omitted .andthe spiral Jof angle iron may be simply dropped into the space between the inner and outer cylinders C and D, as

plainly indicated in Fig. 5, it being understood that the lower end of this spiral merely rests 'on the upper surface of the head B without being fastened to either of the cylinders C or D.

In the modified form shown in Fig. 6, the inner and outer cylinders C and D are disposed horizontally, and in the. freezing chamber between the said cylinders are arranged the spiral J and the band K in the same manner as above described in reference to the construction disclosed in Fig. 1. The

medium.

head B in this case is attached to the stand A and-is made hollow and provided with the inlet 1 for supplying the freezing In the inner face of the head B? is arranged a port a" which leads into the circulating chamber for the freezing medium The head F at the other end of the ice cream freezer is made hollow and is connected at its top by a pipe R with the outer end of the spiral passage so that the freezing medium can pass from'the spiral passage by way of the pipe B into the hollow head F from which leads the discharge pipe L to carry ofi the freezing medium to'a desired lace of discharge. The head F is provi ed-with, an inlet S for the 'c'reamand a discharge T for the ice cream, the outer end of the discharge being closed by a suitable manually-controlled.valve T.

practically the entire cream surface is cooled both in the vertical and the horizontal types of machines.

It is understood that when using the machine, the vessel 0 is filled to about pnehalf of its depth, and in freezing swells to about double its original bulk, and by cooling the heads aswell as the sides, the time consumed for one .operation is reduced considerably, and hence. the daily capacity of the machine is proportionately increased,

Having thus described my invention, I claim as new and desire to secure byLetters Patent: Y

1. An ice cream freezer, comprising a vessel for containing the material to be frozen, a chamber surrounding the said vessel, an angular member forming a spiral passage in said chamber, thesaid'member having the free edge of its horizontal section at the outer face of the said vessel and its vertical member spaced slightly from the wall forming .the chamber, a hollow head common to both the said vessel and the said chamber, the interior of the said head being in' communication with the said spiral passage and the said hollow head having an outlet for the'said vessel, and means for circulating a freezing medium through the said head and 1 passage. 7 v

2. An ice cream freezer, comprising an inner vessel for containing the material to be frozen, an outer vessel forming a chamber surrounding the said inner vessel, an

. angular member arranged in the space hetween the said vessels and forming a spiral passage, the said member having a horizontal section and a vertical section, the free edge of the horizontal section being at the exterior face of the inner vessel, and the vertical section extending adjacent the inner surface of the outer vessel, the convolutions of the member being spaced apart, hollow heads common to both the said vessel and the said chamber, the interiors of the said heads being in communication with the ends of the said spiral passage, a supply pipe connected with one of the said heads, and an outlet pipe leading from the other head.

3. In an ice cream freezer, an inner vessel for containing the material to be frozen, an outer vessel forming a chamber surrounding the said inner vessel, an angular member arranged spirally in said chamber, and having, a horizontal portion, the free edge of which is at the exterior face of the inner vessel, and a vertical port-ion spaced from the inner surface of the outer vessel, the convolutions of the spiral being spaced apart, meansfor closing the space between the convolutions of the spiral at the said vertical portion, hollow closures common to both vessels and communicating with the ends of the spiral passage, a supply pipe for the freezing medium connected w th one of said closures, and an outlet pipe leading from the other closure, o

4. In an ice cream freezer a vessel for containing the material to be frozen, and having an inlet and an outlet for the material, a chamber surrounding the vessel, a spiral formed of angleiiron, and arran d in the said chamber, the said spiral aving its convolutions spaced apart, a hollow head for closing the said vessel and the said chamber, at one end thereof, the said head being connected with a source of freezin medium and communicating with the sai chamber, means for closing the said vessel and chamber at the other end thereof, and an outlet pipe for the freezing medium.

5. An ice cream freezer, comprising an inner cylinder, an outer cylinder arranged in spaced relation to the said inner cylinder, a hollow head common to both cylinders and connected with a source of freezing medium,

, the said head having ports 0 ening into the space between the said cy inders, and a spiral formed of angle iron and having its ner cylinder, an outer cy convolutions spaced apart, the said spiral being arranged in the space between the said cylinders to form a spiral passage in the said s ace. Y 6. nice cream freezer comprising an inlinder arranged-in spaced relation to the said inner c linder a hollow head common to both cylin ers and connected with a source of freezmg medium, the said head havin ports opening into the said space between t c said cylinders, and a spiral formed of angle iron and having its convolutions spaced apart, the said spiral being arranged in the space between the said cylinders to form a spiral passage in the said space, thehorizontal member of the angle iron having its free edge at the exterior face of the inner c linder and the vertical member of the sai an le iron being adjacent the inner surface of t e outer cylinder.

7. An ice cream freezer, comprising an inner cylinder, an outer cylinder arranged in spaced relation to the said inner cylinder, a hollow head common to both cylinders and connected with a source of freezing medium, the said head having ports opening into the space between the said 0 linders, a spiral formed of angle" iron an having its convolutions spaced apart, the'said s iral bei arranged in the space between t e said cy inders to form a spiral passage in the said space, the horizontal member of the angle tions of the said ang e iron spiral adjacent the inner surface of the outer cylinder.

8. An ice cream freezer, comprising a vertical inner cylinder, a vertical outer cylinder arranged in spaced relation to the said inner cylinder, av s iral formed of angle 10o iron and having its convolutions spaced apart the said spiral being arranged 1n the space between the cylinders to form a spiral passage in the said space, the horizontal member of the angle iron "having its free edge at the exterior face of the inner cylinder and the vertical member of the said angle iron being spaced from the inner surface of the outer cylinder, hollow closures for the ends of the c linders, the bottom closure being connect with a source of freezmedium and communicatin with the lower end of the spiral passa e, c said bottom closure having a disc arge o ening' communicatingwith the inner cylin er, the said top closure communicating withthe upper end of said space, an outlet leading from the said upper closure, andan agitator within the inner c linder.

In testimony w ereof I have signed my 120 1 

